Cold Rolled Zinc Aluminium Magnesium Steel used for Corrugated Roof
And Curtain Wall
Definition of Zinc, Aluminium Magnesium steel:
Zinc, Aluminium and Magnesium is an alloy metal, mainly used as the
surface anti-corrosion treatment for steel and steel products,
including a variety of zinc series coatings and a large number of
steel parts as a whole dipping anti-corrosion; initially used as
steel The metal on the surface of the product is pure zinc. With
the development of technology, alloy metals such as aluminum-zinc
alloy and zinc-aluminum-magnesium alloy have appeared one after
another, increasing the effect of corrosion resistance of the metal
Composition and classification of zinc, aluminum and magnesium
Zinc-aluminum-magnesium-coated steel plate refers to a steel plate
with a certain amount of Al or Mg added to the existing hot-dip
galvanized coating or a certain amount of Mg element in the hot-dip
galvanized zinc coating. It has high corrosion resistance, high
Features of cutting edge protection performance.
Inductive analysis of magnesium-coated steel plates for commercial
applications. The Mg content of most of the coatings is ≤3%, and
according to the aluminum content of the coatings,
zinc-aluminum-magnesium coatings are divided into:
1. Low-aluminum-zinc-aluminum-magnesium coating, aluminum content:
1-3.5%, the coating is formed by adding certain aluminum-magnesium
and other elements on the basis of hot-dip galvanizing.
Color-coated steel sheet with low-aluminum-zinc-aluminum-magnesium
substrate. This coating is an upgraded version of the corrosion
resistance of hot-dip pure zinc coating, referred to as BZM coated
steel plate and its color coated plate for short.
2.Medium aluminum zinc aluminum magnesium coating, aluminum
content: 5 ~ 11%
3. High-aluminum-zinc-aluminum-magnesium coating, aluminum content:
55%. The coating is formed by adding certain magnesium and other
elements on the basis of hot-dip aluminum-zinc coating.
Aluminum-zinc-aluminum-magnesium substrate color-coated steel
plate. This coating is an upgraded version of the corrosion
resistance of hot-dip aluminum-zinc coating, referred to as
BAM-plated steel plate and its color-coated plate for short.
Comparison of pure zinc, aluminum zinc and zinc aluminum magnesium
1. Pure zinc coating, metal coating with zinc content of not less
than 99%, is an economical anti-corrosion coating; it is divided
into zinc-plated and non-zinc-plated galvanized steel, and their
corrosion resistance is almost the same. If spraying or painting is
needed later, the products without zinc spangle will be more
beautiful; while the products with thick zinc layer are usually
with spangle (such as zinc layer weight 275g / m2 on both sides).
2. Aluminum-zinc coating is an alloy metal with 55% aluminum
content and 43.5% zinc content. The remaining component is silicon.
Generally, the corrosion resistance of aluminum-zinc coatings is
2-6 times that of pure zinc coatings of the same weight. . The
surface of the aluminized zinc steel coil can be modified by the
production technology to produce beautiful and uniform zinc
spangles, which can be directly used for external use of buildings
or home appliances. However, aluminum-zinc plating also has some
disadvantages. First, the welding performance of the aluminum-zinc
coating is not as good as that of pure zinc, and the welding
process should be minimized during use. Far less than
3. Zinc-aluminum-magnesium coating is an alloy metal with excellent
overall performance. The manufacturing cost is only slightly higher
than that of aluminum-zinc coating. The corrosion resistance of the
coating is much higher than that of pure zinc and aluminum-zinc
alloy, and it also protects the steel plate cut The performance is
very good, and the welding performance is equivalent to that of
pure zinc steel plate.